Electronic Journal of Differential Equations
Values of λ are determined for which there exist solutions in a cone of the nth order nonlinear differential equation (see PDF) satisfying themultipoint boundary conditions (see PDF) where a and f are nonnegative valued, and where both (see PDF) exist.
No. 03, approx. 11 pp.
Eloe, Paul W. and Henderson, Johnny, "Positive solutions and nonlinear multipoint conjugate eigenvalue problems" (1997). Mathematics Faculty Publications. 99.